A verbal is a verb that acts like a different part of speech. Infinitives, gerunds, and participles are all types of verbals. An infinitive is a verbal consisting of to + a verb, and it acts like a subject, direct object, subject complement, adjective, or adverb in a sentence.
HeadOn is the brand name of a topical product claimed to relieve headaches. It achieved widespread notoriety in 2006 as a result of a repetitive commercial, consisting only of the tagline HeadOn. Apply directly to the forehead, stated three times in succession.
A snood is a woman's hairnet or fitted head covering. You've probably seen paintings of nineteenth century women wearing snoods. A snood covers and pulls back the hair, much like a hairnet worn by a restaurant worker. But while a hairnet is functional, meant to keep strands of hair from ending up in customers' food, a snood is ornamental, more like a hat or scarf. It's uncommon to see women wearing snoods these days, but they show up all the time in nineteenth century art. The root of snood is the Old English snod, hair ribbon.